21384727

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{569}}^1$

素因数の和:655

約数の個数: 24

約数和(自身を含む): 27291600

約数和(自身を除く): 5906873

約数列:

[1, 7, 13, 49, 59, 91, 413, 569, 637, 767, 2891, 3983, 5369, 7397, 27881, 33571, 37583, 51779, 234997, 362453, 436423, 1644979, 3054961, 21384727]

約数ペア:

[(1, 21384727), (7, 3054961), (13, 1644979), (49, 436423), (59, 362453), (91, 234997), (413, 51779), (569, 37583), (637, 33571), (767, 27881), (2891, 7397), (3983, 5369)]